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target-alpha: Remap PIO space for 43-bit KSEG for EV6. 

Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2011-04-27 09:22:18 -07:00 committed by Richard Henderson
parent a3b9af1624
commit fa6e0a6354
1 changed files with 7 additions and 3 deletions
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10
target-alpha/helper.c
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@ -220,14 +220,18 @@ static int get_physical_address(CPUState *env, target_ulong addr,
/* Translate the superpage. */
/* ??? When we do more than emulate Unix PALcode, we'll need to
determine which superpage is actually active. */
if (saddr < 0 && (saddr >> (TARGET_VIRT_ADDR_SPACE_BITS - 2) & 3) == 2) {
/* User-space cannot access kseg addresses. */
determine which KSEG is actually active. */
if (saddr < 0 && ((saddr >> 41) & 3) == 2) {
/* User-space cannot access KSEG addresses. */
if (mmu_idx != MMU_KERNEL_IDX) {
goto exit;
}
/* For the benefit of the Typhoon chipset, move bit 40 to bit 43.
We would not do this if the 48-bit KSEG is enabled. */
phys = saddr & ((1ull << 40) - 1);
phys |= (saddr & (1ull << 40)) << 3;
prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
ret = -1;
goto exit;